Helicopter



FIG. 1 is a top and front perspective view of a helicopter showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof, the opposite side elevational view being a mirror image of the shown;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is bottom plan view thereof. 

The ornamental design for a helicopter, as shown and described. 